Psychologist: Susan Boyle's mental health may be harmed by tonight's competition

David Wilson, professor of criminology at Birmingham City University, says the 48-year-old charity worker may be harmed by the psychological pressure she faces.

“The well being of Susan Boyle has to be prioritised over the needs of the programme,” he said.

“And if we prioritise Susan Boyle’s mental health needs then she should not go into the final because if she did I don’t believe the producers know how she will react.”